Several drivers will be changing teams or facing an uncertain future in the sport after Sunday’s Ford Ecoboost 400, the season finale for the 2013 NASCAR Sprint Cup Series season.

Here’s a brief look at what they’ve accomplished in their runs with their current squads:

Kevin Harvick, Richard Childress Racing (2001-2013)

Harvick leaves the only Cup team he’s ever known. He’ll start his 466th and last race with RCR on Sunday third in the points, and seeking back-to-back wins to close out his 13-year run. He has 23 career wins and one on Sunday would tie the most he’s achieved with the team in a single season (5 in 2006). Harvick has twice finished third in the points (2010, 2011) with RCR.

Kurt Busch, Furniture Row Racing (2012-2013)

No Cinderella story in the Chase, but the fact Busch has taken the Denver-based operation to another level and raised its stature in the garage is no small accomplishment. A best finish of second in 41 starts and in 2013, his only full season with the team, has 11 top-fives and 16 top-10 finishes. He has recovered from his career wilderness.

Ryan Newman, Stewart-Haas Racing (2009-2013)

Newman will start his 180th race for SHR before both Harvick and Busch join the team in 2014. The Indiana native has three Chase berths and four wins in his tenure; he carried the team this year with Tony Stewart’s injuries costing him his season and with Danica Patrick learning the ropes in her first full-time season.

Martin Truex Jr., Michael Waltrip Racing (2010-2013)

It’s been four methodical seasons for Truex and MWR; never great, but progressive improvements over the last two years in particular. His 144th and last start with MWR comes after one prior win (Sonoma this year) and a myriad of bad circumstances that have seemed to conspire against him in 2013.

Jeff Burton, Richard Childress Racing (2004-2013)

One of NASCAR’s all-time class acts and great quotes, Burton signs off his 10-year run at RCR with his 338th start for the team this weekend to make way for Newman’s arrival. His four wins were achieved from 2006 through 2008, the latter year of which he was a bona fide title contender before fading to sixth at year’s end.

Juan Pablo Montoya, Earnhardt Ganassi Racing (2006-2013)

He’ll start his 253rd and final, for now, NASCAR Sprint Cup race with EGR and the word “unfulfilled” probably the best descriptor of his NASCAR career. The open-wheel ace has never truly starred in NASCAR except for a handful of races; two road course wins and one Chase appearance all he has to show in his seven full seasons.

Mark Martin, Stewart-Haas Racing (2013)

Martin’s possible final act in Sprint Cup – it’s hard to say for sure as Martin is NASCAR’s equivalent of Brett Favre – has been a good one. Martin served as a mentor and team developer at Michael Waltrip Racing before moving to SHR to fill in for the injured Tony Stewart. He’s run partial seasons since 2005, save for three Hendrick years from 2009 through 2011. Is this finally the end?

Bobby Labonte, too, has already signed off at Phoenix. There may be others from some of the smaller teams, but this is a big list of those leaving their current seats before 2014.

It’s known as “Carburetor Day” – or in its simplest term, just “Carb Day.”

But the final day of on-track action Friday at Indianapolis Motor Speedway before Sunday’s 102nd Running of the Indianapolis 500 is so much more.

Especially on NBCSN, which will have wall-to-wall live coverage starting Friday morning.

Here’s how Friday’s schedule breaks down:

11 a.m. ET: Carb Day kicks off with the final practice for Sunday’s Indy 500. The session will last one hour in length.

12 p.m. ET: We’re going racing! Strap in for coverage of the Indy Lights’ Freedom 100 on the famous Brickyard.

1:30 p.m. ET: We’ll have coverage of the annual IndyCar Pit Stop Challenge. Which teams have the best – and most importantly, fastest and accurate – pit crews? Team Penske has won 10 of the last 12, including the last two years edging out Schmidt Peterson Motorsports each time. Who can potentially beat them this year?

1) 2016 Indy 500 winner Alexander Rossi will discuss how it used to upset him when people suggested he “backed into” his big win and how he didn’t really feel vindicated until he qualified on the front row for last year’s race.
2) Defending 500 winner Takuma Sato, the first Japanese driver to ever win at Indianapolis, discusses the impact of his big win personally and professionally, particularly back in his native land.
3) An essay by Robin Miller on Stefan Wilson giving up his ride last year to allow Fernando Alonso to race for Andretti Autosport.